EKG Tutorial Module DSA

Question 1

Each small box in an EKG makes up how many seconds?

Dark line to dark line (5 boxes) on an EKG makes up how many seconds?

Answer 1

1) 0.04 seconds

2) 0.2 seconds

Question 2

What does the P wave represent?

Answer 2

Atrial depolarization

Question 3

What does the PR segment represent?

Answer 3

Atrial repolarization

Question 4

What is the normal time in seconds for the PR interval?

Answer 4

Less than 0.2 seconds

Question 5

What does the QRS interval represent?

Answer 5

Ventricular depolarization

Question 6

What is the normal time in seconds for the QRS interval?

Answer 6

Less than 0.12 seconds

Question 7

What does the T wave represent?

Answer 7

Ventricular repolarization

Question 8

The U wave is a lot more noticeable under what condition?

Answer 8

Hypokalemia

Question 9

What HR defines tachycardia?

Bradycardia?

Answer 9

1) Greater than 100 BPM

2) Less than 60 BPM

Question 10

How do you calculate rate on an EKG?

Answer 10

Find a r-wave that aligns on a dark line and count to the next r-wave: 1st ‘dark line’ = 300; next line = 150; then 100; then 75; then 60; then anything else past that is bradycardia

Question 11

What is a normal axis characterized by on EKG?

Answer 11

Positive deflection in leads I & aVF

Question 12

What is a left axis characterized by on EKG?

Answer 12

Positive deflection in lead I and negative in aVF

Question 13

What is a right axis characterized by on EKG?

Answer 13

Negative deflection in lead I and negative in aVF